Forum: Pontiac - Race
02-13-2003, 07:02 PM
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Replies: 5
Views: 269
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Forum: Pontiac - Street
01-16-2003, 10:03 PM
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Replies: 11
Views: 258
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Forum: Pontiac - Race
01-12-2003, 10:52 PM
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Replies: 14
Views: 269
Tom,
At 3200 lbs, 4-speed, and 4.33, You...
Tom,
At 3200 lbs, 4-speed, and 4.33, You could run a P292/301F8(259/267 @ .050, .551/.551 valve lift) or even a P296/304F8(263/271 A .050, 556/.556 valve lift). The P296/304F8 has good power from...
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Forum: Pontiac - Race
01-11-2003, 11:53 AM
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Replies: 14
Views: 269
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Forum: Pontiac - Race
12-19-2002, 06:47 PM
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Replies: 29
Views: 681
TorkJunki,
Super Stock cars in the 70s-80s...
TorkJunki,
Super Stock cars in the 70s-80s used stock UN-PORTED heads, and none of them ran a solid lifter cam. The cam you have is one of my favorites for the Pontiac, and always makes over 550...
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Forum: Pontiac - Street
12-18-2002, 08:52 PM
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Replies: 11
Views: 263
Rhoads lifters definitely 'tick' at idle. When...
Rhoads lifters definitely 'tick' at idle. When the rpm is low, and naturally the oil pressure is low too, the outer part of the lifter rises a few .001"s (8 or 10 thou...) before the inner parts...
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Forum: Pontiac - Race
12-16-2002, 06:25 PM
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Replies: 29
Views: 681
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Forum: Pontiac - Race
12-14-2002, 09:20 PM
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Replies: 29
Views: 681
FastEddy,
The correct number is .022" COLD...
FastEddy,
The correct number is .022" COLD or .026" HOT. However, the adjustment range is from .018" HOT to .030" HOT, so you are still within range. If you want more top-end, don't be afraid to...
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Forum: Pontiac - Race
12-14-2002, 11:00 AM
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Replies: 29
Views: 681
Eric,
There's no problem. When the engine...
Eric,
There's no problem. When the engine is hot, the lash will be about .018". This is acceptable, even .022" is OK, but as loose as I like to run them. Any looser than .022", and they become...
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Forum: Pontiac - Street
12-14-2002, 10:12 AM
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Replies: 30
Views: 694
Steve,
There are two different items at work...
Steve,
There are two different items at work here.
1.---On most cylinder heads, whenever I have around a 75% exhaust-to-intake ratio, I use an 8 degree bigger exhaust cam. If the ratio is under...
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Forum: Pontiac - Street
12-13-2002, 09:46 PM
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Replies: 30
Views: 694
BAB,
At a 9.5 CR, the 280/288H should be...
BAB,
At a 9.5 CR, the 280/288H should be making close to 1 BHP/CID, ie--350 cid=350 BHp, 455 cid=455 BHP. The 276/284F10 makes about 1.2 BHP/CID at 9.5 CR, 430 BHP from 355, 540 BHP from 455 cid....
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Forum: Pontiac - Street
12-13-2002, 08:51 PM
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Replies: 8
Views: 245
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Forum: Pontiac - Street
12-13-2002, 08:47 PM
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Replies: 30
Views: 694
I think that the article in question compared...
I think that the article in question compared just one company's solid and hydraulic cams, of the same general lift and duration.
With my cams, hydraulic vrs solid, the solids ALWAYS make more power...
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Forum: Pontiac - Race
12-13-2002, 07:55 PM
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Replies: 29
Views: 681
To all you UD users, THANKS!!
Later on in...
To all you UD users, THANKS!!
Later on in the spring of 2003, I'll have some new longer-duration .626"s and also some bigger duration .685"s, which are high-lift versions of the .640" family.
I...
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Forum: Pontiac - Street
11-30-2002, 10:10 PM
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Replies: 30
Views: 694
RH152,
What type of fuel pump, etc, do you...
RH152,
What type of fuel pump, etc, do you have? All my cams, starting with the 231/239, are sensitive to fuel volume. You need at least a high-volume NASCAR-type mech pump and 1.2" #8 gas line...
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Forum: Pontiac - Street
11-30-2002, 10:04 PM
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Replies: 30
Views: 694
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Forum: Pontiac - Street
11-28-2002, 10:24 AM
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Replies: 6
Views: 381
Here is what I've seen.....
You can run solid...
Here is what I've seen.....
You can run solid lifters on hydraulic cams, either regular or roller, and you can run hydraulic lifters on solid cams, either regualr or roller.
Here's what really...
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Forum: Pontiac - Race
11-17-2002, 01:24 PM
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Replies: 23
Views: 320
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Forum: Pontiac - Race
11-13-2002, 06:11 AM
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Replies: 11
Views: 213
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Forum: Pontiac - Race
11-12-2002, 09:55 PM
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Replies: 11
Views: 213
The cam lobe might show 1 degree of retard,...
The cam lobe might show 1 degree of retard, compared to the nose.
An example of this using my 288 Roller profile: Nose degreed in to 100* ATDC.
Duration at .050" equals 255*, and cam timing at...
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Forum: Pontiac - Race
11-11-2002, 08:52 PM
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Replies: 11
Views: 213
Well, I'm UDHarold, and I design all the...
Well, I'm UDHarold, and I design all the UltraDyne cams.
All of our cams are unsymetrical, but they MUST be symetrical at the nose. They match in the first 5, or more, derivatives on either side of...
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Forum: Pontiac - Race
11-11-2002, 08:40 PM
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Replies: 18
Views: 231
Jim Butler has run some fast times with my...
Jim Butler has run some fast times with my P310/318R6, 310/318 @ .020, 279/287 @ .050, 200/206 @ .200, and .640/.640 valve lift, 1.5s. You can run up to 1.7s with this cam, 225-240 lbs on the seat,...
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